Backup Battery Pack How Long Will An IPod Nano Play With A Belkin Backup Battery Pack Attached?

How long will an iPod Nano play with a Belkin Backup Battery Pack attached? - backup battery pack

I have the Belkin Backup Battery Pack (with four AA batteries 3.) Generation of the iPod, and I felt like each new set of batteries for my iPod about 8 hours additional playing time on your iPod. The Nano is much more energy efficient, but. My question is: How many hours of play time you pull the battery every 4 sets when using the Belkin Backup Battery Pack with Nano? The Nano starts with ~ 12 hours on a full charge its internal battery, which was added with the AA?